Jackman, 41, credited the diet for giving him his buff physique while filming "Wolverine" in 2009, for which he put on 20 pounds of muscle.

In a new interview with VegNews, Brendan Bazier explains how Jackman became interested in going vegan after using the nutritionist's award-winning line of plant-based whole food nutritional products called Vega. He also reveals that the actor has brought him onboard to help bulk up for the "Wolverine" sequel.

“In the past he had eaten a lot of chicken for his role, but he took a lot of Vega, too,” says Brazier. “It turned out I was going to New York City so he said 'Well, why don’t you just come over?' so I went over to his place and we had a great chat and he told me how he was trying out veganism for environmental and health reasons and to set a good example for his kids. It’s not just for his own career anymore, which he wrote in the foreword. He was listing the reasons why he was interested in 'Thrive,' and he was concerned for the environment. That’s definitely something that he was aware of, and wanted to help instead of hurt.”

While Brazier isn't sure if Hugh will go all the way with a vegan bodybuilding regimen, he's confident that for the most part, most everything will be plant-based.

"He has a great trainer in Don Scott, who is not vegan but is well-aware of the benefits of being vegan, and he takes Vega," says Brazier. "He’s going to be training Hugh again for the upcoming movie, and I’ll be helping with the nutrition program. I’ll be making nutrition suggestions about what he can eat to pack on the muscle — instead of chicken — so and I don’t know if he’ll do 100-percent plant-based, but he’s certainly going to incorporate elements of it. That’s our plan — to do as much plant-based as possible and, ideally, completely vegan."